Table 21: Analysis of the accuracies reported in the studies [⁶⁵-⁶⁸] using the accelerometer sensor.

Stages	Accelerometer	Accelerometer Microphone	Accelerometer Microphone GPS
Stage 1	85.89%	85.89%	85.89%
Stage 2	-	86.50%	86.50%
Stage 3	-	100.00%	100.00%
Overall	85.89%	90.80%	90.80%